Don't have much choice, until "world" is accepted as a legitimate MIME
type grouping and "vrml" as a legitimate MIME type. Issuing the VRML 1.0
spec as an RFC and petitioning the IANA will make this happen. The only
question seems to be whether "world" is the right high-level grouping,
and will be accepted by IANA. I think so - this is an issue that will
take awhile to resolve anyways, so for now x-anything is fine.
Brian